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问题 单项选择题

8086在响应中断请求时( )。

A．输出一个负脉冲，将中断类型码从A1)0到AD7读入

B．输出两个负脉冲，在第二负脉冲时读取中断类型码

C．输出一个负脉冲后，再进行一次I/O读周期，读取中断类型码

D．输出一个负脉冲，同时提供I/O读的控制信号，读取中断类型码

答案

参考答案：D

单项选择题 A1型题

胸椎片发现椎体均匀性压扁成片状，应怀疑（）

A.脊柱结核

B.强直性脊柱炎

C.椎间盘突出

D.椎管狭窄症

E.嗜酸性肉芽肿
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单项选择题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.
To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

A．what
B．which
C．that
D．if
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